Gas-burning air-heating furnace.



N. 867,906. l PATBNTND 00T. 8,1907.

v v. W. BLANCHARD. 'GAS BURNING AIR HEATING PURNAGB.

APPLICATION FILED JAN. 22, 1906,

y N I NNN MVK m ull Hllllwllllllllln-SE g l l l l I I I l 1HE Nanms Psrsks co., wAsmNawN. fcnfor direct heating of rooms VIRGIL W. BLANCHARD, OF

GAS-B URN IN G AIR NEW YoRicN. Y.

-HEATING FURNACE.

Specification of Letters Patent. Application filed January 22, 1906.

Patented Oct. 8, 190'?. Serial No. 297,246.

To all whom it may concern:

Be it known that I, VIRGIL W. BLANCHARD, of New York, in the county of New York and State of New York, have invented certain new ments in Gas-Burning Air-Heating Furnaces; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form part of this specification.

This invention is a novel gas burning air heating furnace for use in dwellings and large buildings and designed to take the place of the air heating furnaces now The invention in pafticular is an improvement upon the furnace shown in my application-No. 297,245 filed January 22, 1906. y

ln the present invention the products of combustion and the heated air may be kept separate or may be com mingled and sent to the rooms to be heated according to the preference of the user.

In the present invention I provide means for entirely consuming the gaseous fuel and converting it into a useful safe heating gas by either supplying it with air in such quantities that not only are all the combustible elements in the gaseous fuel oxidized but the resultant gases are in a measure re-oxygenated by admixture of large quantities of air more than sufficient to insure thorough combustion so that the resultant gases issuing from the mouth of the furnace contain sufficient oxygen to support respiration; and such gases are well adapted I by discharging them thereinto through the ordinary air supplied in hot air pipes. The furnace is moreover provided with means for heating large quantities of air by the products of combustion but separately therefrom which air can be sent to the living rooms through the air ducts without being commingled with the products of combustion.Y Again, if desired, the products of combustion and the air can be commingled in the distributing chamber and together sent to the living room.

The present invention resides in the novel means and apparatus hereinafter described and claimed and the accompanying drawing illustrates -a vertical central section through such an` apparatus.

In the base' A, of any suitable construction, are arranged primary mixing-tubes B receiving gas from/supply pipes C and discharging into secondary mixingtubes D located at into the lower end of the burner F, which is preferably I a jacket F leaving an anduseful Improvethe center of the base and discharged I constructed substantially as described in my applica- I tion No. 297,240 filed January 22, 1906, and is provided with a series of annular flanges or constrictions f and numerous perforationsf. The burner is surrounded by air heating space 2 between the burner and jacket from which the air is supplied to the perforationsf. I 1f The burner is suspended from a perforated plate G mounted on the upper end of a cylinder G, surrounding the burner and its jacket, which is supported upon a plate H which in turn is supported upon a plate H2 mounted on top of a cylinder I-l3 surrounding the secondary mixing tubes D and supported upon the base A.

The chamber 7 between the plates H and H2 forms an air space which communicates with the space 2 through apertures h and openings 2 in the jacket Ff.

Surrounding cylinder G is a second cylinder I which is supported on. plate H and has its upper end closed by a plate I located a short distance above plate G and preferably provided with a series of annular depending rings or ribs i which alternate with and are opposed to similar upstanding ribs g on plate f, the latter plate being perforated at g to admit air to flow upwardly in jets into the space between the plates I, the air entering the cylinder G from the chamber 7 through the openings h.

The space between the cylinders G and I forms a descending ue 3 for the products of combustion and at the lower end of this flue pass through openings I2 in the lower end of cylinder I into an ascending flue 4 formed between the cylinder I and a third cylinder .I surrounding the same and supported upon plate H and having its upper end closed by a plate J/ in which is an opening connected with a pipe K which leads to the uptake or chimney, of combustion may escape through pipe K to the chimney.

Surrounding the cylinder J is an annular partition L fitted between the plate H and the top plate M of the casing; and exterior to the partition L is a casing N fitted between the plates H and M. The top plate M of the casing is provided with a central opening m for the escape of heated air into a distributing chamber O on top of the casing, as shown, from which chamber the hot air may be conducted off-through pipes connected to the collars o on top of the distributing chamber, as shown. l i

The casing N is preferably made air-tight and air may be supplied thereto through an opening 'n connected to a cold air pipe. As shown, however, this opening n is closed by a cap 1?/ and air is admitted into the upper end of the casing through openings n2 regulable and closable by an annular valve n3.

The space between the casing N and partition L forms a descending air .flue 6 which connects at bottom with the chamber 7 through openings li in plate I-I. The space between the partition L and cylinder .I

the products of combustion i GQ the former orms an ascending air heating `iiue 5 which communicates at bottom with chamber 7 through openingsh5 in plate II.

rIlhe cylinder H3 may be provided with an opening through which access can be had to the regulating sleeves D2 on the tubes D, said opening being closed by a door II4 when the apparatus is in operation.

Operation'. Suitable mixtures of gas and air are admitted through the tubes B and D into the lower end oi the burner, and flowing upwardly therethrough are consumed and completely oxidized by admixture with the large quantities oi air entering through the jets f substantially described in my application No. 297,240 aforesaid. The products oi combustion escape from the burner into the space between the plates I@ plate becoming intensely heated by reason ot the impact oi the hot gases thereagainst. The gases are deflected outwardly to the iiue 3 and are subjected to the further action of heated jets oi air rising through the apertures g in plates Gf, and are further heated by contact withthe annular ribs i@ g, the ormer oi which tends to retain any unconsumed hydrogen gas While thelatter detains any heavy unconsumed elements until thoroughly oxidized. The gases descend through lflues 3 and are iurther admixed with air jetted thereinto through apertures g3 on the lower end oi cylinder G, and as the gases pass into fines 4 they are commingled with further resh air admitted through openings h* in plate I-I. In this manner a greater quantity oi air than is necessary to produce complete oxidation oi all the combustible elements is supplied to the gases while they are intensely heated7 and this mixture rises through tlues 4 to the pipe I( and may be discharged into the chimney ii the valve Ii/ in said pipe be open, and it be so desired by the operator. As Athese gases are not deleterious to health I propose to utilize them to heat the rooms and ior this purpose provide a series oi openings lc in the pipe K within the outlet m of the hot air tlues which openings are closable by a valve kf, which can be operated ,lrom the outside oi the case by a pull-rod k2. When this valve kf is opened, the valve IQ is closed or partly closed, and the highly heated products oi combustion oxygenated by the large admixture of fresh air are diverted into the distributing chamber O and pass to the various apartments oi the building through the hot air pipes. Cold fresh air is admitted into the upper ends oi air tine G through the openings n2 and passes down into chamber 7 where it is distributed to supply the tubes D and burner F as already explained. But thegreater quantity oi this air passes up through fines 5 and is heated by Contact with the hot walls .l oi flue Lt and the hot top plate I betere it reaches the distributing chamber O. Ii the valve k is closed the hot air alone will be distributed through the rooms. It the valve 7c be opened theI hot air and the oxygenated hot products of combustion are commingled in chamber O and together pass to the het air registers in the building. Thus by this apparatus I am able to supply highly oxygenated hot products ot combustion alone or fresh air alone, or combine the two. In the latter case every heat unit generated in the apparatus is utilized to the very best advantage and a furnace of this nature of; small size will supply enough heat to warm a large building.

Having thus described my invention what I thereore claim as new and desire to secure by lieti ers latent thereon is:

1. In a gas burning hot air furnace, the combination ol' a burner, a descending tine exterior lo the burner communicat'ing therewith, an ascending flue exterior to the de scending flue conniuinicating therewith, and means l'or supplying heated air to the burner and to said lines; willi a distributing chamber connected with the llues. an ont let pipe and a valvcd opening in the outlet pipe for the. products of combustion whereby the products o1' combusY tion may be admitted into said distributing chamber.

2. In a gas burning hot air furnace, the combination of a burner, a descending liuc exterior to the burner commu nicating therewith, an ascending tlue exterior to the descending tlue connnunicating therewith. and an outlet from the upper end of the ascending liuc; with means for supplying gaseous fuel to said burner. and means for supplying heated air to the burner and to said llucs; with a distributing chamber, and a valved opening in the outlet line whereby the products ol combustion be admitted into said distributing chamber.

In a gas burning hot. air furnace, the combination of a burner, a descending ilue exterior to the burner communicating therewith. an ascending flue exterior to Isaid de scending ilue and communicating therewith, a valved outlet from the upper end of the said ascending 1lue. means for supplying gaseous fuel to said burner, and means t'or sun plying heated air to the burner and to said lines; with a distributing chamber above the said ascending flue. an ascendingl air flue snrroululiny.;- thel said ascending llue. a descending air flue surroundingl the ascending air llueY and an air chamber below the said llucs comnninicating thcrewith.

-l. The combination ot a casing having an air chamber at its lower end and a distributing chamber at. its upper end, a burner in the casing, a cylinder surroiniding the burner, a second cylinder surrounding the lirst cylinder` and a plate closing the second cylinder above the burner. a third cylinder surrouinling the second cylinder` an outY let flue connected with said third cylinder, a partition beY tween the walls of the easing and said third cylinder forming an exterior descendingair Ilue and an interior ascending air tine, the latter communicating with the distributing chamber, and said air chamber communicating with said ilues and with the burner.

lhe combination of a casing having an air chamber at its lower end and a distributing chamber at its upper end, a burner located centrally in the casing, a. cylinder surrounding the burner, a second cylinder snrrouinling the tirst cylinder, a plate closingl the second cylinder above thc burner. a third cylinder surrouiuling the second cyl inder, a plate closing the upper end ot' the third cylinder. and an outlet; tine connected with said plate; with a partition between thc walls of the casing and said third cyl indcr forming an exterior descending air Ilue and :in interior ascending air ilue, the latter communicating with the distributing chamber, and said air chamber communieating with said lines, and with the. burner.

(i. ',l`he combination of a burner, the cylinder inclosing thc burner, a perforated plate on thc upper end ol' said cylinder to which the burner is attached, said plate, being provided with annular upstanding ribs. a second cylinder inclosingl the first cylinder, a plate closing the upper end of the cylinder above the burner and provided with downwardly projecting annular ribs the space between said cylinders forming a descending line for the products ol' combustion, a third cylinder exterior to the second cylin der forming an ascending tine. and an outlet l'or the g. at the top ot the third cylinder.

T. The combination of a burner, a cylinder inclosng the burnerl a plate on the upper end of said cylinder to which the burner is attached, a second cylinder iin-losing the first. cylinder, a plate closing the upper end of the cyl inder above the burner, the space between said cylinders forming a descending tine for the products of combustion. and a third cylinder exterior to the second cylinder form ing an ascending flue, and an outlet for the gases at the may El (l lll() lli) lit

of a burner, the cylinder inclosing a perforated plate on the upper end of said wardly projecting` annular ribs, the space between said cylinders forming combustion, p N' an ascending Ilue, and an outlet for the gases at the top of the third and a distributing; cham ber above the third cylinder with an air chamber below all said cylinders and communicating with the burner and with the several iiues, and a valve whereby the products of combustion may be kept separate from or commingled with the i'resh air in the distributing chamber.

t). The combination of a burner, a cylinder the burner, which the burner is attached, a second cylinder inclosing the iirst cylinder, a plate closing the upper end of the l bl cylinder above the burner, the space between said cylinders forming a descending iiue for the products of cornbustion, and a third cylinder exterior to second cylinder forming an ascending fiue, and an outlet for the gases at the top o1 the third cylinder, a distributing' chamber above said third cylinder, a casing surrounding said cylinders, an annular partition between the cylinder and casingl forming exterior descendingl and interior ascending air liues, the latter communicating with the distributing chaInber, an air chamber below all said cylinders communicating with the burner and with the several nues, and valves whereby the products of combustion may be kept separate from or conmiingling,l with the fresh air in the distributing chamber.

l0. The combination of a burner, a plate surrounding the upper end of the burnery provided with opstanding rings or ribs and perforations for the admission of air, and a plate overlying the burner and provided with depending In testimony that I claim the foregoing as my own, I attix my signature in presence of two witnesses.

VIRGIL W. BLANCHARD. In presence of` .'Ltiuns It. MANsFInLD, L. E. Wirt-IAM. 

